Experimental and theoretical studies of acoustic and viscometric properties of binary mixtures of tetrahydrofuran with some alkyl acrylates at temperatures from 293.15 to 318.15 K

The ultrasonic speeds, u and viscosities, eta of binary mixtures of tetrahydrofuran (THF) with methyl acrylate (MA), ethyl acrylate (EA), n-butyl acrylate (n-BA) and tert-butyl acrylate ( t-BA) over the entire composition range expressed by mole fraction, x(1) of THF, including those of pure liquids, were measured at temperatures (293.15, 298.15, 303.15, 308.15, 313.15, and 318.15) K and at atmospheric pressure. From the experimental data, the excess isentropic compressibility, 4, excess ultrasonic speed, u(E), excess molar isentropic compressibility, K-s(E),m and deviations in viscosity,K-S(E) frri have been calculated. The partial molar isentropic compressibilities, (K) over bars,m,1 and (K) over bars,m,2, and excess partial molar isentropic compressibilities, (K) over bar (E)(s,m,1) and <()over bar>(E)(s,m,2) over the whole composition range, partial molar isentropic compressibilities, (k) over bar degrees(s,m,1)n and (k) over bar degrees(s,m,2) and excess partial molar isentropic compressibilities, (k) over bar (degrees E)(s,m,1)and (k) over bar (degrees E)(s,m,2) of the components at infinite dilution have also been calculated. The variation of these parameters is discussed in terms of molecular interactions in the solution. Also, the viscosities of these binarymixtures were correlated with various empirical and semi-empirical models and the theoretical results were compared with the experimental findings. Furthermore, the ultrasonic speeds of these mixtures have been theoretically calculated by using scaled particle theory and the results are compared with experimental values. (C) 2017 Elsevier B.V. All rights reserved.